Partial clustering prevents global crystallization in a binary 2D colloidal glass former

Abstract

A mixture of two types of super-paramagnetic colloidal particles with long range dipolar interaction is confined by gravity to a flat interface of a hanging water droplet. The particles are observed by video microscopy and the dipolar interaction strength is controlled via an external magnetic field. The system is a model system to study the glass transition in 2D, and it exhibits partial clustering of the small particles. This clustering is strongly dependent on the relative concentration $\xi$ of big and small particles. However, changing the interaction strength $\Gamma$ reveals that the clustering does not depend on the interaction strength. The partial clustering scenario is quantified using Minkowski functionals and partial structure factors. Evidence that partial clustering prevents global crystallization is discussed.

References in corpus (5)

• The Jamming Transition in Granular Systems
• Frank's constant in the hexatic phase
• Partial Clustering in Binary Two-Dimensional Colloidal Suspensions
• Dynamic Glass Transition in Two Dimensions
• Stable crystalline lattices in two-dimensional binary mixtures of dipolar particles

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• Optimized Large Hyperuniform Binary Colloidal Suspensions in Two Dimensions
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• Langevin Dynamics simulations of a 2-dimensional colloidal crystal under confinement and shear
• Nonadditive Interactions Unlock Small-Particle Mobility in Binary Colloidal Monolayers
• Disordering two-dimensional magnet-particle configurations using bidispersity
• Dynamical Spreading and Memory Retention Under Power Law Potential